Brush for flour screens or bolters.



No. 690,994. Patented Jan. l4, I902.

J. G. PETERSON. BRUSH FOR FLUUR'SCREENS 0R BOLTERS.

(Application filed June 28, 1901.)

llwrrnn @rarns nrnnrr Orrrcn.

JOHN G. PETERSON, OF MILWVAUKEE, WISCONSIN.

BRUSH FOR FLOUR SCREENS OR BOLTERS.

SEECIFECATEON forming part of Letters Patent No. 690,994, dated January 14, 1902. Application filed June 28, 1901. Serial No. 66,341. (No model.)

To aZZ whom, it may concern.-

Be it known that I, JOHN G. PETERSON, a citizen of the United States, residing at Milwaukee, county of Milwaukee, and State of Wisconsin, have invented new and useful Improvements in Brushes for Flour Screens or Boltel's, of which the following is a specification.

My invention relates to improvements in that class of antomatically-moving brushes which are used in connection with flour-bolting machines to prevent the meshes of the bolting-cloth from becoming obstructed, and it pertains more especially to the peculiar construction of the body of the brush and the means employed for supporting and hold ing the bristles in place.

My invention is further explained by reference to the accompanying drawings, in which- Figure 1 represents the back or underside of the brush. Fig. 2 is a vertical section drawn on line m m of Fig. 1. Fig. 3 is a side view. Fig. tis a longitudinal section showing a modified form of a device for holding the bristles in place, and Fig. 5 is a detail showing the preferred form of holding the tuft of bristles together preparatory to inserting them between the clamping-flanges of the brush.

Like parts are identified by the same ref erence-letters throughout the several views.

The body of the brush comprises a concavo-convex portion A, annular bristle-retaining clamping-flanges B and O, and a central pivotal support D, all of which parts are formed integral from a single piece of metal, which is preferably pressed out or struck up into shape from sheet metal by the application of dies. A single annular tuft of bristles I or a tuft of other equivalent material is located at or near the marginal edge of said body, which is clamped between and held rigidly in place by said annular flanges B and O. In the preferred form (shown in Fig. 2)

the tuft of bristles is first secured between the strands E E of the wire cable F, when said cable, together with the bristles, is placed between the flanges B and O, as indicated in Fig. 2, when said flanges are pressed firmly together around said cable and against the sides of said annular tuft of bristles, whereby the flour escapes.

the same is held firmly in place. By the modified form shown in Fig. 4 the wire cable F is dispensed with and the bristles are held in place by the folds a, Z), and c of the sheet.- metal plate H, which serves as a substitute for the wire cable for holding the tuft of bristles. The plate H with the tuft of bristles shown in Fig. 1 when used is held in place between the clamping-flanges B and C in the same manner as the wire cable and bristles shown in Fig. 5 are held. It will be noticed that in the modified form shown in Fig. 4- the marginal edge G of the plate terminates with a downward bend and that the inner ends of the bristles terminate with an upward bend, wherebysaid bristles are folded back between the folders of the metal and are thereby held securely in place.

It will be understood that when in use with the sieves the brushes are located between a piece of bolting-cloth above and awire screen below and that the bristles of the brush bear against the surface of such bolting-cloth, and the brush is caused to automatically move along the surface of the screen and boltingcloth by the movement of said sievesin the act of bolting flour, and that the best results are attainedby a rocking or vibratory movement of the brush, and for this reason the brush is provided with the central pivotal support D, which rests upon the wire screen and upon which the brush is adapted to oscillate from one side to the other as it moves along the screen. This pivotal support D is formed, as shown, integral with the sides and clamping-flanges of the body, as stated, from a single piece of metal. If desired, folds of canvas or soft leather or other equivalent material maybe substituted for the tuft of bristles I. To provide for the escape of flour or other substances which may fall from the bolting-cloth upon the concave central portion A of the brush, the same is provided with one or more apertures J, through which In view of the fact that the bolting-cloth is formed of a delicate silk fabric, which is comparatively expensive, it is of great importance that the device used for keeping the meshes of said fabric clear and open should be as smooth as possible and operate with the least possible friction against said cloth.

ICO

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a brush for cleaning bolting-cloth of flour-sieves, an integrally-formed metal body comprising a central portion having a pivotal projection, and two annular bristle-retaining flanges surrounding the central portion, said projection extending below the plane of the central portion and. flanges, in combination with an annular tuft of bristles located between and held. in place by said clampingflanges, substantially as set forth.

2. In a brush for cleaning bolting-cloth of flour-sieves, an integrally-formed metal body comprising a central portion having a pivotal projection, and two annular bristle-retaining flanges surrounding the central portion, said projection extending below the plane of the central portion and flanges, in combination with an annular tuft of bristles interlaced and wound together with a plurality of wires, located between and held in place by said clamping-flanges, substantially as set forth.

3. In a brush for cleaning bolting-cloth of flour-sieves, an integrally-formed metal body comprising a central portion, provided with perforations or apertures having a pivotal projection and two annular bristle-retaining flanges surrounding the central portion, said projection extending below the plane of the central portion and flanges, in combination with an annular tuft of bristles located between and held in place by said clampingflanges, substantially as set forth.

i. In a brush for cleaning bolting-cloth of flour-sieves, an integrally-formed metal body comprising a central portion provided with a plurality of apertures for the escape of flour therefrom, having a pivotal projection and two annular bristle retaining flanges surrounding the central portion, said projection extending below the plane of the central portion and flanges, in combination with an annular tuft of bristles interlaced and wound together with a plurality of wires, located between and held in place by said clampingflanges, substantially as set forth.

In testimony whereof I affix my signature in the presence of two witnesses.

JOHN G. PETERSON.

Witnesses: Y

J AS. B. ERWIN, O. L. RoEsoH. 

